Deprecate and remove service stop API. (#3578)

Fixes #3570

cmd/admin-handlers.go

@@ -50,24 +50,6 @@ func (adminAPI adminAPIHandlers) ServiceStatusHandler(w http.ResponseWriter, r *
 	writeSuccessResponseJSON(w, jsonBytes)
 }
 
-// ServiceStopHandler - POST /?service
-// HTTP header x-minio-operation: stop
-// ----------
-// Stops minio server gracefully. In a distributed setup, stops all the
-// servers in the cluster.
-func (adminAPI adminAPIHandlers) ServiceStopHandler(w http.ResponseWriter, r *http.Request) {
-	adminAPIErr := checkRequestAuthType(r, "", "", "")
-	if adminAPIErr != ErrNone {
-		writeErrorResponse(w, adminAPIErr, r.URL)
-		return
-	}
-
-	// Reply to the client before stopping minio server.
-	w.WriteHeader(http.StatusOK)
-
-	sendServiceCmd(globalAdminPeers, serviceStop)
-}
-
 // ServiceRestartHandler - POST /?service
 // HTTP header x-minio-operation: restart
 // ----------

cmd/admin-handlers_test.go

@@ -56,8 +56,6 @@ func (c cmdType) apiMethod() string {
 	switch c {
 	case statusCmd:
 		return "GET"
-	case stopCmd:
-		return "POST"
 	case restartCmd:
 		return "POST"
 	}
@@ -70,8 +68,6 @@ func (c cmdType) toServiceSignal() serviceSignal {
 	switch c {
 	case statusCmd:
 		return serviceStatus
-	case stopCmd:
-		return serviceStop
 	case restartCmd:
 		return serviceRestart
 	}
@@ -187,11 +183,6 @@ func TestServiceStatusHandler(t *testing.T) {
 	testServicesCmdHandler(statusCmd, t)
 }
 
-// Test for service stop management REST API.
-func TestServiceStopHandler(t *testing.T) {
-	testServicesCmdHandler(stopCmd, t)
-}
-
 // Test for service restart management REST API.
 func TestServiceRestartHandler(t *testing.T) {
 	testServicesCmdHandler(restartCmd, t)

cmd/admin-router.go

@@ -33,8 +33,7 @@ func registerAdminRouter(mux *router.Router) {
 
 	// Service status
 	adminRouter.Methods("GET").Queries("service", "").Headers(minioAdminOpHeader, "status").HandlerFunc(adminAPI.ServiceStatusHandler)
-	// Service stop
+
-	adminRouter.Methods("POST").Queries("service", "").Headers(minioAdminOpHeader, "stop").HandlerFunc(adminAPI.ServiceStopHandler)
 	// Service restart
 	adminRouter.Methods("POST").Queries("service", "").Headers(minioAdminOpHeader, "restart").HandlerFunc(adminAPI.ServiceRestartHandler)
 

cmd/admin-rpc-client.go

@@ -36,18 +36,10 @@ type remoteAdminClient struct {
 // adminCmdRunner - abstracts local and remote execution of admin
 // commands like service stop and service restart.
 type adminCmdRunner interface {
-	Stop() error
 	Restart() error
 	ListLocks(bucket, prefix string, relTime time.Duration) ([]VolumeLockInfo, error)
 }
 
-// Stop - Sends a message over channel to the go-routine responsible
-// for stopping the process.
-func (lc localAdminClient) Stop() error {
-	globalServiceSignalCh <- serviceStop
-	return nil
-}
-
 // Restart - Sends a message over channel to the go-routine
 // responsible for restarting the process.
 func (lc localAdminClient) Restart() error {
@@ -60,13 +52,6 @@ func (lc localAdminClient) ListLocks(bucket, prefix string, relTime time.Duratio
 	return listLocksInfo(bucket, prefix, relTime), nil
 }
 
-// Stop - Sends stop command to remote server via RPC.
-func (rc remoteAdminClient) Stop() error {
-	args := AuthRPCArgs{}
-	reply := AuthRPCReply{}
-	return rc.Call("Admin.Shutdown", &args, &reply)
-}
-
 // Restart - Sends restart command to remote server via RPC.
 func (rc remoteAdminClient) Restart() error {
 	args := AuthRPCArgs{}
@@ -88,7 +73,7 @@ func (rc remoteAdminClient) ListLocks(bucket, prefix string, relTime time.Durati
 	return reply.volLocks, nil
 }
 
-// adminPeer - represents an entity that implements Stop and Restart methods.
+// adminPeer - represents an entity that implements Restart methods.
 type adminPeer struct {
 	addr      string
 	cmdRunner adminCmdRunner
@@ -146,18 +131,16 @@ func initGlobalAdminPeers(eps []*url.URL) {
 	globalAdminPeers = makeAdminPeers(eps)
 }
 
-// invokeServiceCmd - Invoke Stop/Restart command.
+// invokeServiceCmd - Invoke Restart command.
 func invokeServiceCmd(cp adminPeer, cmd serviceSignal) (err error) {
 	switch cmd {
-	case serviceStop:
-		err = cp.cmdRunner.Stop()
 	case serviceRestart:
 		err = cp.cmdRunner.Restart()
 	}
 	return err
 }
 
-// sendServiceCmd - Invoke Stop/Restart command on remote peers
+// sendServiceCmd - Invoke Restart command on remote peers
 // adminPeer followed by on the local peer.
 func sendServiceCmd(cps adminPeers, cmd serviceSignal) {
 	// Send service command like stop or restart to all remote nodes and finally run on local node.

cmd/admin-rpc-server.go

@@ -45,16 +45,6 @@ type ListLocksReply struct {
 	volLocks []VolumeLockInfo
 }
 
-// Shutdown - Shutdown this instance of minio server.
-func (s *adminCmd) Shutdown(args *AuthRPCArgs, reply *AuthRPCReply) error {
-	if err := args.IsAuthenticated(); err != nil {
-		return err
-	}
-
-	globalServiceSignalCh <- serviceStop
-	return nil
-}
-
 // Restart - Restart this instance of minio server.
 func (s *adminCmd) Restart(args *AuthRPCArgs, reply *AuthRPCReply) error {
 	if err := args.IsAuthenticated(); err != nil {

cmd/admin-rpc-server_test.go

@@ -47,17 +47,13 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 	}
 
 	go func() {
-		// mocking signal receiver
+		// A test signal receiver
 		<-globalServiceSignalCh
 	}()
 
 	ga := AuthRPCArgs{AuthToken: reply.AuthToken, RequestTime: time.Now().UTC()}
 	genReply := AuthRPCReply{}
 	switch cmd {
-	case stopCmd:
-		if err = adminServer.Shutdown(&ga, &genReply); err != nil {
-			t.Errorf("stopCmd: Expected: <nil>, got: %v", err)
-		}
 	case restartCmd:
 		if err = adminServer.Restart(&ga, &genReply); err != nil {
 			t.Errorf("restartCmd: Expected: <nil>, got: %v", err)
@@ -65,10 +61,6 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 	}
 }
 
-func TestAdminShutdown(t *testing.T) {
-	testAdminCmd(stopCmd, t)
-}
-
 func TestAdminRestart(t *testing.T) {
 	testAdminCmd(restartCmd, t)
 }

pkg/madmin/API.md

@@ -39,7 +39,6 @@ func main() {
 | Service operations|LockInfo operations|Healing operations|
 |:---|:---|:---|
 |[`ServiceStatus`](#ServiceStatus)| | |
-|[`ServiceStop`](#ServiceStop)| | |
 |[`ServiceRestart`](#ServiceRestart)| | |
 
 ## 1. Constructor
@@ -98,23 +97,6 @@ Fetch service status, replies disk space used, backend type and total disks offl
 
  ```
 
-<a name="ServiceStop"></a>
-### ServiceStop() (error)
-If successful shuts down the running minio service, for distributed setup stops all remote minio servers.
-
- __Example__
-
- 
- ```go
-
-	st, err := madmClnt.ServiceStop()
-	if err != nil {
-		log.Fatalln(err)
-	}
-	log.Printf("Succes")
-
- ```
-
 <a name="ServiceRestart"></a>
 ### ServiceRestart() (error)
 If successful restarts the running minio service, for distributed setup restarts all remote minio servers.

pkg/madmin/README.md

@@ -105,7 +105,6 @@ go run service-status.go
 ### API Reference : Service Operations
 
 * [`ServiceStatus`](./API.md#ServiceStatus)
-* [`ServiceStop`](./API.md#ServiceStop)
 * [`ServiceRestart`](./API.md#ServiceRestart)
 
 ## Full Examples
@@ -113,7 +112,6 @@ go run service-status.go
 #### Full Examples : Service Operations
 
 * [service-status.go](https://github.com/minio/minio/blob/master/pkg/madmin/examples/service-status.go)
-* [service-stop.go](https://github.com/minio/minio/blob/master/pkg/madmin/examples/service-stop.go)
 * [service-restart.go](https://github.com/minio/minio/blob/master/pkg/madmin/examples/service-restart.go)
 
 ## Contribute

pkg/madmin/examples/service-stop.go

@@ -1,44 +0,0 @@
-// +build ignore
-
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package main
-
-import (
-	"log"
-
-	"github.com/minio/minio/pkg/madmin"
-)
-
-func main() {
-	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY and my-bucketname are
-	// dummy values, please replace them with original values.
-
-	// API requests are secure (HTTPS) if secure=true and insecure (HTTPS) otherwise.
-	// New returns an Minio Admin client object.
-	madmClnt, err := madmin.New("your-minio.example.com:9000", "YOUR-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
-	if err != nil {
-		log.Fatalln(err)
-	}
-
-	err = madmClnt.ServiceStop()
-	if err != nil {
-		log.Fatalln(err)
-	}
-	log.Println("Success")
-}

pkg/madmin/service.go

@@ -95,30 +95,6 @@ func (adm *AdminClient) ServiceStatus() (ServiceStatusMetadata, error) {
 	return storageInfo, nil
 }
 
-// ServiceStop - Call Service Stop Management API to stop a specified Minio server
-func (adm *AdminClient) ServiceStop() error {
-	//
-	reqData := requestData{}
-	reqData.queryValues = make(url.Values)
-	reqData.queryValues.Set("service", "")
-	reqData.customHeaders = make(http.Header)
-	reqData.customHeaders.Set(minioAdminOpHeader, "stop")
-
-	// Execute GET on bucket to list objects.
-	resp, err := adm.executeMethod("POST", reqData)
-
-	defer closeResponse(resp)
-	if err != nil {
-		return err
-	}
-
-	if resp.StatusCode != http.StatusOK {
-		return errors.New("Got HTTP Status: " + resp.Status)
-	}
-
-	return nil
-}
-
 // ServiceRestart - Call Service Restart API to restart a specified Minio server
 func (adm *AdminClient) ServiceRestart() error {
 	//